Insulator.



No.' 88888888 I `IN SSSSSSSS IIIIIIIIIIIIIIIIIIIIIIIIIIIII 7.

UNITED sfrlrrns Parana: onirica.

INSULATOR.

Specification o! Letters Patent. Patented. March 31, 1908.

Application flled September 23, "l Serial No, 394,132.

To all whom fit may concern:

Be it known that l, EDWARD F. PADDEN, citizen of the United States,residingf at Chicago, in the county of Cook and State of l'llinois, haveinvented certain new and useful Improvements in Insulators, of'which thefollowing is a specification.

This invention relates to insull'itors for electric lines or wires, andparticularly to insulators used in connection with the cross arms of theordinary poles on which the wires are supported.

The object of the invention is to forni an improved device of the kind,in which the insulator will he protected l'roin injury Vhy being locatedin a recess formed to receive it in the arm.

A further object of the invention is to form an insulator characterizedhy improved means for holding wire in place,

The invention is illustrated in the :Lr-conn panying drawings in. whichf Figure 1 is a side view of 'the insulator. Fig. 2 is an end viewthereof. Fig. 3 is a side View of a cross arm with the insulator inplace tl'ierein. Fig. 4 is an end view of the parts shown vin Fig. 3,

The insulator is made ol glass or similar non-conducting material, andconsists of a cylindrical hody indicated at l, lwhich is threaded uponits surlace, as shown, to torni a screw, which may he screwed in thercross arm or supportingl structure. ,At one end the hody is providedwith a squared projection 2, to which a wrench or tool may he applied toturn the saine. The ho'dy is grooved lengthwise, as indicated at 3,toreceive tho wire 4, the hottorn ol' tho'groove extendinpr below the haseot the thread, so that the wire will rest helow said thread.` 'in orderto hold the wire inthe groove, a glass screw 5 is provided, which isfitted into a suitable tap made in the side of the body and serving toclose the groove and to clamp the wire 4 in the hot-toni thereof.

i At G is indicated a cross arm or support to which the insulator isapplied. This cross arni is bored and threaded so that the body l may hescrewed therein. and it is slotted as indicati-al at 7, to match withthe groove in the insulator'. and to allow the wire to he entered intothe insulator, The erin. is also hored lo allow the insertion of thescrew 5. as indicated in Figs. 3 and et.

Aninsulator so constructed and applied to a cross arln is protectedagainst danger oi hreakage hy stones or shots or other missiles, and atthe salue time it may he readiljyT placed in or renioved 'from thesocket or here formed in thel cross erin to receive it. Obviously theinsulator may he used in other locations and in connection with otherconstructions than the cross arm of a telegraph pole.

l. claim l The combination with a support havin a threaded hole throughthe saine and a s ot communicating with said hole, of' an insulatorconnirisingl a threaded cylindrical inleg'ral hod7 screwed into saidhole and having; a longitudinal groove in the side which registers withsaid slot and a tap in 'the side ofthe holly the groove, and a screw exytendiiw throuoh the slot and tau and into rs rs l the groove, to holdthe conductor therein.

ln testimony whereof l aflix niy signature in presence ot two witnesses.

yEDWARD F. PADDEN.

Vitnesses 1 WM. il. llonrNsoN, liAwnnNon Dunno.

Cil

